Feeding mechanism



NOV. 6, 1928.

` C. F. OSGOOD FEEDING MECHANISM Filed Dec. 21. 1922 parti ally Patented Nov. 6, 1928. i

UNITED STATES 1,690,429 PATENT ori-ica CHARLES F. OSGOOD, OF CLAREMONT, NEW HAMPSHIRE, ASSIVGNOR- TO SULLIVAN MACHINERY COMPANY, A CORPORATION OF MASSACHUSETTS.

FEEIDING` MECHANISM.

Application led December 21, 1922! Serial No. 608,303.

My invention relates to feeding mechanisms, and more particularly to feeding mechanisms for rock drillingl devices.

An ect of my invention is to provide an in'iprovcd feeding mechanism. Another object of my invention is to provide an improved fluid pressure operated feedingV mechanism having improved controlling means. A further object of my invention is to provide an improved feeding mechanism of the sto-,

per type having improved means for controlling the operation thereof. Still another object of my invention is to provide improved controlling means for the feeding means of a rock drilling mechanismwhich is automatically controlled by the varying resistance to rotation of the drilling tool. Other objects and advantages of my invention will hereinafter more fully appear. Y

ln the accompanying drawings I have shown for purposes of illustrationone form which my invention may assume in practice.

Fig. l is a view, partially in elevation and in central longitudinal section through a drilling mechanism in which the illustrative form of my invention is incorporated. I

Fig. 2 is an enlarged view, partially in elevation'and partially in central longitudinal section, showing the details of construction otIv the feeding mechanism.

Fie. 3 is a view in transverse section on the line 3--3 of Fig. 2.`

Fig. 4 is an elevation of the brake applying band which I employ.

Fig is a transverse horizontal sectional view taken substantially on line 5-5 of Fig. 1.

ln this illustrative form of my invention I have shown it employed in a stoping mechanism generally designated land comprising a drilling motor 2 in whose cylinder 3 a piston 4i reciprocates,

'its reciprocation to rotate, by usual ratchet and pawl mechanism whose casing is generally designated 5, and to strike a drill steel 6. Ars

shown the piston 4 is provided with a forwardly projecting striking bar 11al having formed thereon spiral and straight grooves 5 whichcooperate respectively with a pawl carrier 6a and a usual chuck nut 7a, the. latter being threadedly vsecured within a usual rotatable chuck member 8aL which receives the drill steel 6. Herein the pawl carrier 6 has A a plurality of spring pressed pawls9a mountthe piston 4l being operative in ed thereon which are adapted to react on a relatively stationary internal ratchet ring Feeding means for feeding the drilling mechanism toward the ywork is provided and comprises a feed cylinder 7 in which a feed piston 8 is reciprocable, the latter having a piston rod 9 which is provided with a plurality of key-ways 10 whose function will hereinafter be explained. At its rear end the pistonrod 9 has pivotallyv connected thereto a foot piece 11 which is provided with aplurality of relatively sharp blades or toes `12 which are adapted to be pressed tightly against an eX- traneous abutment during drilling andv prevent rotation of the feed piston rod. Secured to the rear end of the cylinder7 is a housing generally designated l5 comprising two elements g a member 16 threaded into the rearend of the cylinder 7 a chamber surrounding the piston Yrod and in this chamber next to the rod isarranged a split brake material receiving sleeve of relatively thin metal 18 in which a band of brake material 19 is carried. Surrounding the sleeve 18 is a resilient brake applying band of generally helical form 2O havingfat its opposite ends enlarged portions or lugs 21 and 22. The lug 21 ofthe band is adapted to be seated in a groove 23 formed in the interior of the member 16 and a means, as indicated at 2a, is provided for preventing relative rotation between the cylinder and the member 16 thus causing the lun* 21 to move relative .to the stationary piston rod, this heilig true either during longitudinal movement or rotative movement of the cylinder member 7. Surrounding the piston rod below the member 22 and at the rear end of the chamber formed between the members 16, 17 and the piston rod 9 is a` l and a closure member 17. Nithin the members 16 and 17 there is formed sleeve member or collar 25, this sleeve member being splined and cooperating by means of= its splines with the grooves 10 previously described, whereby no rotation of thesleeve or collar 25 can occur without rotation of the piston rod. The member 25 is also provided with a notch or groove 26 in which the lug 22 is located. From the Vconstruction describechit will be apparent that relative rotation betweenthe cylinder 7 and piston rod 9 will be accompanied by tightening or loosening of the band Q0 and so by application or release of the brake, due to the varying resist-` ance to drill steel rotation. A handle member 27 is provided for the purpose of enabling orthefscope of the appendedclaiins. v .Y

iii

the drill ruimer to conveniently hold the drill at certain times during operation and for the purpose of bodily turning the motor and feed cylinder enabling him to control the brake as will hereinafter appear.r Y`

The mode of operation of my invention will be clearly apparent'. Let it be assumed that the drilling apparatus is set up in position to start a` hole with the foot piece ll engaging an abutment and with the feed partially extendedv and with the drill steel againsttherock. The operator by preventing rotation of the member 11, as he can do by .placing his foot upon it, and by turning the cylinder I7 relative to the piston rod 9, as may be done by pulling or pushing, depending upon the construction, upon the handle 27, may retard the feed as ,much as desired, Y

the release of the handle 27,01- moving of it in what might be called its backward direction, releasing the feed entirely or partially,

depending upon the degree `of inoven'ient.r

After'the holeis started. it will always be possible to vary thefeed simply by placing a tensioirlipon [the brake band through pulling upon the handle 27 althoughthe handle is normally released at this time. Moreover` should thedrill steel stick or jam, or should muddy or sticky `drilling be encountered so that the rotation was materially more diliiciilt, it will be evident that the feed would be retarded by the reaction, tliroughthe ratchet and .fpawl :mechanism thek motor and feed cylinder, of the rotation mechanism upon the band 20 acting on the stationary.pistoiiiod, any increased Vresistance to rotation tending with a member 20 whose helix is wound in the right direction to out down the rate of feed and so to render the drill automatically selfcontrolling as to the strength of feed. A It willi of course be understood that this `operation will result regardless of, the type of steel rotating mechanism used and that it is my ntention herein to cover my improvement in connection with any such rotating mechanism.Jv i j i While I have in this application specifi# callyfdescribed one form whicliiny invention mayiassume in practice, -it willbe understood that'tliis form of the saine is shown for purposes-of illustration and'tliat they invention.'

may be modified and embodied in various other forms without departing from its spirit What I claim as new and desire to secure byiLetters'Patent is: e Y

l. Ina drilling mechanism, thecoinbination with .means jfor `rotating `the drill steel and means for feeding the steel including relatively rotatablefeeding elements. of feed controlling `means responsive tothe resistance to .drill stoel rotation Vand operative uponv relative rotation between said feeding elements for .automatically restraining move-Y ment between said feeding elements.

2. In a drilling inecliiinisiin the combina.- tionwith means for rotating the drill steel and means for feedingthe steel including relativelyrotatable feeding elements, of feed .controlling means responsive to the resist;

ance to drill steel rotation and operative upon relative rotation between said feeding elements for automatically applying friction between said feeding elen'icnts.

3. In' a drilling mechanism, the combination with means for rotating the drill steel and means for feeding the steel comprising a pair of tclescoping feeding members having relative longitudinal movement during fecd ing, of feed control means responsive to the resistance to drill steel rotation for automatically variably applying friction between said members, said automatic neans including frictional resistance means directly frictionally engaging one of said feedinfy members.

4. In a drilling mechanism, trlie combination with means for rotating the drill steel and feeding means` for the steel comprising a stationary feeding member having means foi' preventing rotation thereof during` drill feed and arotatableand longitudinally movable feeding member, of means responsivcto the resistance to drill steel rotation for automatically controlling said feedingnieans.

5. In a drilling mechanism, the combination with means for rotating the drill steel and feeding means for the steel comprising a' stationar1 feeding nieinbci-)aiid a rotatable and longitudinally movable feeding member,

of feed ycoi'itrf'illing means responsive `to thel resistance to drill steelrotation for automati-` cally restraining movement betwecn said feeding members.

- 6. 4In a drilling mechanism, thecombiiiation with means for rotating the drill steel and feeding means for the Vsteel comprising relatively rotatable` and relatively longitudinally movable feeding members, of means iesponsive to the resist-ance to" drill steel rotation and rendered effective through relative rotation of said members for automatically controlling said feeding means.

7. In a drilling mechanism, ythe combinationwith'v means for rotating the drill steel and feeding means for the steel including relatively yrotatable and relatively `longitndinally4 movable feeding elements, of means responsive to the resistance to drill steel rotationland lcyiperativc upon relative rotation between said feedinl elements for automatically controlling said fidediii g means, aiidmanually operable means cooperating with said automatic lmeans forfcontrolling said feeding means..y f

8. Ina drilling inechanisiintlie combination with means for rotating the drill steel and feeding means for the steel-including relatively movable feeding elements|` of means operatively connected to said feeding elements and responsive to the resistance to drill lll) ligt

silient friction band engageable with one ofV said feeding members and adapted to be contracted and expanded as the resistance to drill steel rotation varies.

10. In a drilling mechanism, the combination with a motor for rotating the drill steel and feeding means for the steel including relatively movable feeding members, one of which is stationary, of means responsive to the resistance to drill steel rotation and operative only upon relative movement between said feeding members for automatically applying resistance between said feeding memers to control the rate of feed.

ll. In a drilling mechanism, a drilling motor, feeding means therefor, including a non mally stationary feeding element, a brake for controlling said feedingmeans, and manually operable means for bodily rotating said niotor relative to said stationary feeding element for applying said brake. A

l2. In a drilling mechanism, a. drilling motor, feeding means therefor including relatively movable members, a brake for controlling said feeding means, 4and manually oper` able means comprising a grasping handle projecting laterally' from the drilling meclnr nisin for positivel moving one of saidmembers angularly re ative to the other member for applying said brake. 1

13. In a drilling mechanism, a drilling motor, feeding means therefor, a brake for controlling said feeding means, and means inf cluding a manually graspable handle projecting from the drill for enabling the operator to bodily rotate the drilling motor to 1 control said brake,

14. In a drilling mechanism, a drilling motor, means for rotating a drill steel, `feeding means for said drilling motor comprising aA stationary'non-rotatable member a rotatable and longitudinally movable member connect ed to the drilling motor, `and means controlled by rotary movement of said rotatable feeding member effected by the varying resistance to rotary movement of said drill steel adapted to automatically restrain said feeding means. l5. In a drilling mechanism, a drilling motor, a supporting handle carried thereby and rigidly fixed against movement relative thereto, feeding means 'for said drilling motor, and means operated by the rotation of said handle adapted to rest-rain said feeding means mechanically.

16. In a drilling mechanism, a. drill motor, a supporting handle carried thereby, and rigidly fixed against movement relative thereto, feeding means for said drilling motor, and means operative by the rotation of said handle about the axis of said drilling motor to restrain said feeding means. i

17.l In a drilling mechanism, a. drilling motor, feeding means thereforeomprising a normally stationary non-rotatable member and a rotatably movable member, and means carried by said movable member and controlled bythe rotation thereof adapted relative to said stationary feeding member to resist feeding movement.

18. In a drilling mechanism, a drilling motor, feeding means therefor comprisinga feed cylinder element and piston element, said elements being relatively rotatable, and automatic means carried by said feed cylinder and controlled by the relative rotationV between said elements adapted Vto apply fric tion to said piston element.

19; In a drilling mechanism, a drillingmotor,feeding means therefor including a normally stationary feeding element, said drilling motor being bodily rotatable relative to said stationary feeding element, a brake, and means controlled by the rotation of said drilling motor relative to Saidstationary feeding element for applying said brake to retard said feeding means.

20. In a; drilling mechanism, a drilling motor comprising a cylinder land a piston reciprocable therein, a drill steel adapted to receive blows from said piston, rotation means for the drill steel operated by said piston, feeding means for said motor includ'- ing relatively movable feeding elements one of which is stationary, and feed control means carried by the movable feeding element and automatically controlled by the resistance to rotation of said drill steel to apply friction directly to said stationary ele` ment of said feeding means.

2l. `In a drilling mechanism, a tor adapted to transmit blows to a drill steel, drill steel rotating means operated thereby, feeding means including relatively movable feeding elements, a brake, and means automatically controlled by the resistance to drill steel rotation adapted tov apply said brake to one of the feeding elementsfto retard .said feeding means, said brake being mechanically appliedrand released wholly without manual intervention as the resistance to drill steel rotation varies.

22. In a drilling mechanism, a drilling motor, feeding means ltherefor comprising a feed cylinder and piston, said cylinder being rotatable relative to said piston, means for resisting rotation of said cylinder relative to said piston, and friction means cardrilling n1oried bysaid feed cylinder and automatically controlled by the resistance toiotation thereof adapted to retard relative movement between said cylinder-,and piston.

23. In a drilling mechanism, a drillino'.

motor, feeding means therefor including rel iitively rotatable feedingeleinents, a brake forcontrolling said feedingmeans, and combined automatic and manual means adapted tobrake said `feeding means upon rotation of oneof said feeding elements relative yto the other, and means for ei'ecting rotation of one of said feeding elements relative to the other. i f

24. ln a drilling ii'iechaniSm, a drilling motory including steel rotating means, air pressure feeding means therefor, and auto- `maticy 1means controlled by the .rotation of saidvsteel rotating meaiisadapted to restrain said air l-preseure feeding means, said auto# matic, means oon'ipiising a mechanically operated brake `automatically applied and released Whollywithout manual intervention asftlic resistance todrillY steel rotation varies.

25. In a drilling mechanisim a drilling motor for actuatinga drill steel, feeding means therefor including feeding elementsy having relative angular Aand longitudinal movements,rotation i nieans for Ysaid drill steel, and frictional resistance means automatically mechanically operative to control the operation of said feeding means 'in accordance with the nature of the drillingencountered by the drill steel, said automatic means being mechanicallyapplied and released automatically steclrotation varies. l Y

26. 'In a drilling mechanism, a drilling iiiotorand feeding means therefor comprising a cylinder and piston, Aone of which is connectedI to said motor and tlieother ofv which non-rotativelyengages an abutment, a housing fixed relative to said cylinder niem-` ber a bralteiir said liousino and brake a)- 2 C plyingmeiins including abend one end of which is fixed to Asaid housing and Whose other end is fixed againstiotation with respect to `said piston member, andimeansdncluding a collar non-rotatively connected to isaidepiston member, but betweenl which and .said piston member relative longitudinal movement occurs during 'feeding,-said collar receiving {alie-last mentioned end of said band. t

127. Inf/a drilling mechanism, in combiV nation, a drilling motor and feeding means as the resistance to drill ton members, said brake applying member,

engaging said brake for app ying or releasingrtliesanie.

28. In combination, a drilliiigmotor, feedi ing mechanism therefor including a lonfri tudinally and'angularly movable cylinder connected to said motor, a piston having a rod non-rotatively engaging an abutment,4

and means for controlling Said feeding rmeelif anisiii' including a brake carried by said `cylinder and engaging said iston rod,` and brake applying'means inclut ing aband mein-g ber whose opposite ends are respectively iixed asto angular movement with respect to saidl cylinder and piston, said brake applying,

means` beiiw operative to :apply 4^said brake upon angu arinoveiiientfof Saidifced cylinder relative to said pistoii. I

29. In a drilling mechanism, a drilling motor, feeding means therefor including relatively rotatablemembers,fand means for controlling said1 feeding means"operative upon relative rotation between said feedin" members and `including an element spline@ y iii longitudinal sliding relation with one ot' said members and a 4lraking element cooperating respectively with said element und one of said members.

30. In a drilling mechanisim a drilling motor, feeding means including relatively angularly movable feedingiiiembers, andA means for controlling said* feeding means including a,.lriction deviceo erative upon relative4 angular Vmovement Ibetween `,said feeding members. i f A i ,Iniadrillinff mechanism, the 4combination with means fbrzactiiatiiig the drill steel.

and feeding means for the steel comprising relatively angularlyl and relatively longi tiidinallyv movable feeding .meinbers,1of means automatically operative upon rela-k tive angular movement between 'saidffeeding members .for controlling said feeding incluis in accordance with the nature of the `work encountered.

In testimony whereof l ture. w CHARLES F. OSGOOD.

CERTIFICATE OF CORRECTION.

Patent No. 1,690,429. Granted November 6, i928, to

CHARLES F OSGOOD.

`It is hereby certifiedthat error appears in the printed specificationvof the above numbered patent requiring correction as follows: Page 2,. line 33, after the word "mechanism" insert a comma; page 3, line 21, claim 10, after the word n "members'' strike out the comma; line 29, claim I1, after the word "therefor", strike out the comma; and line 69, claim I6, after the word "thereby"A strike out the comma; line 80, claim 17, strike out the word "adapted" and insert the same to follow after the word "member" in line 81; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case inthe Patent Office.

Signed and sealed this 11th day of December, A. D. 1928.

M. J. Moore,

(Seal) Acting Commissioner of Patents? e 

